Holger Rune's difficult run hit a new nadir with a one-sided loss to Brandon Nakashima in the second round of the Shanghai Masters.
Holger Rune was left to regret tweeting a map of the US Open site to point spectators towards his first-round match.
Carlos Alcaraz and Iga Swiatek, the current world number ones, will bid to defend their US Open titles they won last year, but a host of rivals will be out to dethrone them.
Alejandro Davidovich Fokina defended his decision to deliver and ill-advised underarm serve that virtually handed victory to Holger Rune in their third-round clash at Wimbledon.
Holger Rune has admitted he is "super happy" following Danish compatriot and former world number one Caroline Wozniacki confirming her comeback to tennis.
Holger Rune came through a gripping five-set clash against Francisco Cerundolo to earn a well-deserved spot in the French Open quarter-finals.